AP EAMCET · PHYSICS · Thermal Properties of Matter
The efficiency of a heat engine that works between the temperatures where Celsius-Fahrenheit scales coincides and Kelvin-Fahrenheit scales coincides is (approximately)
- A \(45 \%\)
- B \(35 \%\)
- C \(60 \%\)
- D \(50 \%\)
Answer & Solution
Correct Answer
(C) \(60 \%\)
Step-by-step Solution
Detailed explanation
When Celsius - Fahrenheit scale coincide, \(\begin{aligned} & \frac{\mathrm{F}-32}{180}=\frac{\mathrm{C}-0}{100} \Rightarrow \frac{\mathrm{~T}_1-32}{9}=\frac{\mathrm{C}}{5} \\ & \therefore \quad \mathrm{~T}_1=-40^{\circ} \mathrm{C} \end{aligned}\) When kelvin - Fahrenheit scale…
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